{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-53260 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-53260 is a medium-severity vulnerability in Linux kernel, published on 15 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-53260 and fix it if it is affected.\n\nWhat it is: CVE-2023-53260 is a medium-severity vulnerability in Linux kernel, published on 15 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-53260 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2023-53260/ (Markdown: https://insights.sbomify.com/CVE-2023-53260/index.md)","id":"CVE-2023-53260","markdown":"https://insights.sbomify.com/CVE-2023-53260/index.md","name":"CVE-2023-53260","record":{"aliases":["BELL-CVE-2023-53260","DEBIAN-CVE-2023-53260","GHSA-mvvw-5ww4-3hgm","UBUNTU-CVE-2023-53260"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A race condition in the Linux kernel's overlayfs can cause a null pointer dereference, leading to a system crash.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":5.5,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\novl: fix null pointer dereference in ovl_permission()\n\nFollowing process:\n          P1                     P2\n path_lookupat\n  link_path_walk\n   inode_permission\n    ovl_permission\n      ovl_i_path_real(inode, \u0026realpath)\n        path-\u003edentry = ovl_i_dentry_upper(inode)\n                          drop_cache\n\t\t\t   __dentry_kill(ovl_dentry)\n\t\t            iput(ovl_inode)\n\t\t             ovl_destroy_inode(ovl_inode)\n\t\t              dput(oi-\u003e__upperdentry)\n\t\t               dentry_kill(upperdentry)\n\t\t                dentry_unlink_inode\n\t\t\t\t upperdentry-\u003ed_inode = NULL\n      realinode = d_inode(realpath.dentry) // return NULL\n      inode_permission(realinode)\n       inode-\u003ei_sb  // NULL pointer dereference\n, will trigger an null pointer dereference at realinode:\n  [  335.664979] BUG: kernel NULL pointer dereference,\n                 address: 0000000000000002\n  [  335.668032] CPU: 0 PID: 2592 Comm: ls Not tainted 6.3.0\n  [  335.669956] RIP: 0010:inode_permission+0x33/0x2c0\n  [  335.678939] Call Trace:\n  [  335.679165]  \u003cTASK\u003e\n  [  335.679371]  ovl_permission+0xde/0x320\n  [  335.679723]  inode_permission+0x15e/0x2c0\n  [  335.680090]  link_path_walk+0x115/0x550\n  [  335.680771]  path_lookupat.isra.0+0xb2/0x200\n  [  335.681170]  filename_lookup+0xda/0x240\n  [  335.681922]  vfs_statx+0xa6/0x1f0\n  [  335.682233]  vfs_fstatat+0x7b/0xb0\n\nFetch a reproducer in [Link].\n\nUse the helper ovl_i_path_realinode() to get realinode and then do\nnon-nullptr checking.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"ovl: fix null pointer dereference in ovl_permission()","id":"CVE-2023-53260","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"null_dereference","year":"2023"},"n_packages":0,"n_references":3,"next":{"headline":"coresight: Fix memory leak in acpi_buffer-\u003epointer","id":"CVE-2023-53261"},"packages":[],"prev":{"headline":"VMCI: check context-\u003enotify_page after call to get_user_pages_fast() to avoid GPF","id":"CVE-2023-53259"},"products":["Linux"],"published":"2025-09-15","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"A race condition in the Linux kernel's overlayfs can cause a null pointer dereference, leading to a system crash.","url":"https://insights.sbomify.com/CVE-2023-53260/"}